Display screen up-down lock

Abstract

A display screen up-and-down lock is arranged on LED display screen box frames, is used for connecting two up-and-down adjacent LED display screen box frames, and comprises an upper lock piece and a lower lock piece, and the upper lock piece and the lower lock piece are correspondingly distributed on the upper side and the lower side of the LED display screen box frames respectively and are constructed to be of a structure capable of being locked in an aligned mode. The upper lock piece is provided with a locking part with a lock hole, the lower lock piece comprises a lock rod and a rotating handle, the lock rod comprises a round rod part and a flat head part, the rotating handle is connected with the round rod part at a preset angle, the section of the flat head part comprises a semicircular section and a transition arc section, the lock rod and the lock hole are eccentrically arranged, and the rotating handle is connected with the round rod part at a preset angle. The axis of the lock rod and the axis of the lock hole are in a parallel offset relation, the transition arc section of the flat head portion is in clearance fit with the lock hole so that the flat head portion can be inserted into the lock hole, and the semicircular section of the flat head portion is in eccentric friction contact with the lock hole to form radial interference fit so as to achieve locking. The display screen up-down lock has the advantages of being convenient to operate and capable of preventing looseness.

Description

Technical Field

[0001] This utility model relates to the field of display screen technology, specifically to a display screen locking mechanism. Background Technology

[0002] With the development of the times, LED displays are widely used in government squares, National Day celebrations, leisure squares, large entertainment squares, bustling commercial centers, advertising information boards, commercial streets, railway stations, waiting rooms, performing arts centers, live television broadcasts, exhibition halls, concert venues and other places.

[0003] Viewing LED displays in large venues requires large-sized LED displays. However, due to the limited technology for manufacturing huge LED display screens, and the inconvenience of transporting and maintaining large LED displays, locking devices are needed between two adjacent small display screen frames to splice them into a large screen.

[0004] Traditional LED display screens often use bolts or simple pins for locking the top and bottom, which are cumbersome to operate, prone to loosening, and difficult to align. This results in low assembly and disassembly efficiency and makes it difficult to meet the needs of rapid assembly of large screens. Therefore, there is an urgent need for a new type of display screen locking mechanism to solve these problems. Utility Model Content

[0005] In view of this, a convenient and secure display screen locking mechanism is provided.

[0006] A display screen upper and lower lock, mounted on an LED display screen frame, is used to connect two adjacent LED display screen frames. It includes an upper lock and a lower lock, which are respectively distributed on the upper and lower sides of the LED display screen frame and configured to align and lock. The upper lock has a locking portion with a lock hole. The lower lock includes a locking rod and a rotating handle. The locking rod includes a round rod portion and a flat head. The rotating handle is connected to the round rod portion at a predetermined angle. The flat head has a cross-section including a semi-circular segment and a transition arc segment. The locking rod is eccentrically positioned relative to the lock hole, and the axis of the locking rod is parallel to the axis of the lock hole. The transition arc segment of the flat head has a clearance fit with the lock hole, allowing the flat head to be inserted into the lock hole. The semi-circular segment of the flat head has an eccentric frictional contact with the lock hole, forming a radial interference fit to achieve locking.

[0007] Furthermore, the radius of curvature of the transition arc segment is greater than the radius of the keyhole, and the radius of the semicircular segment is the same as the radius of the keyhole.

[0008] Furthermore, the lower locking component also includes a locking channel, the locking rod is coaxially mounted in the locking channel, the side wall of the locking channel has a transverse opening, the upper side of the transverse opening has an unlocking groove and a locking groove communicating with the locking channel, the rotating handle passes through the transverse opening and is fixedly connected to the locking rod at an angle, the rotating handle can drive the locking rod to move along the locking channel axis in the locking channel and the rotating handle can be rotated into the unlocking groove or the locking groove.

[0009] Furthermore, the unlocking groove and the locking groove are arranged sequentially in the direction toward the locking part. When the rotating handle is turned into the unlocking groove, the flat head is located outside the lock hole. When the rotating handle is turned into the locking groove, the semicircular section of the flat head makes eccentric frictional contact with the inner wall of the lock hole.

[0010] Furthermore, the lower locking member is provided with a lower mounting hole, which forms a cross-shaped through-hole structure with the locking channel. The upper locking member is provided with an upper mounting hole. The lower end of the locking part is fixed to the upper mounting hole, and the upper end of the locking part is inserted into the lower mounting hole. The lock hole is located at the upper end of the locking part and is opposite to the locking channel. The axial center line of the locking channel and the center line of the lock hole are not on the same straight line.

[0011] Furthermore, the upper end of the locking part is provided with a guide cone surface, which is used to guide the locking part into the lower mounting hole.

[0012] Furthermore, the round rod portion is provided with multiple positioning glass bead grooves in the circumference, and the lower locking component also includes multiple glass bead screws installed on the LED display screen frame. When the locking rod is rotated to lock with the lock hole, the glass bead portion of each glass bead screw is engaged in the corresponding positioning glass bead groove to assist in locking.

[0013] Furthermore, the lower locking component also includes a bushing, which is fitted onto the inner wall of the end of the locking channel near the lower mounting hole. The bushing is coaxial with the locking rod, and the inner diameter of the bushing is larger than the diameter of the locking rod. The locking rod passes through the lock hole and is inserted into the bushing, and the flat head does not protrude from the outer end face of the bushing.

[0014] Furthermore, the inner wall of the lock hole is provided with a wear-resistant metal sheath or the locking part is made of stainless steel.

[0015] Furthermore, the length of the flat head is greater than the depth of the keyhole.

[0016] Compared with the prior art, the present invention has at least the following beneficial effects:

[0017] First, this type of display screen lock uses an eccentrically designed flat head to form a radial interference fit with the lock hole, which can be quickly locked or unlocked by simply rotating the handle. No auxiliary tools are required, making it easy to operate and significantly improving assembly efficiency.

[0018] Secondly, this type of display screen locking mechanism uses a positioning glass bead groove and a glass bead screw to prevent loosening after locking. When the locking rod is rotated to the locking position, the glass bead part of the glass bead screw embeds into the groove of the round rod part, producing a glass bead positioning sound to indicate that the installation is in place, and the rotational resistance increases to prevent springback and loosening. Attached Figure Description

[0019] Figure 1 This is a three-dimensional structural diagram of a display screen locking mechanism according to an embodiment of the present invention.

[0020] Figure 2 This is an exploded view of the upper and lower locking components of a display screen upper and lower lock according to an embodiment of the present utility model.

[0021] Figure 3 This is a schematic diagram of the structure of a display screen upper and lower locking rod and a rotating handle in accordance with an embodiment of the present utility model.

[0022] Figure 4 This is a cross-sectional schematic diagram of a display screen locking mechanism according to an embodiment of this utility model.

[0023] Figure 5 yes Figure 4 A magnified view of part A in the diagram.

[0024] Figure 6 yes Figure 4 A magnified view of part B in the diagram.

[0025] In the picture,

[0026] 1. Locking part; 2. Lock hole; 3. LED display screen frame; 4. Locking rod; 5. Rotating handle; 6. Round rod part; 7. Flat head; 8. Semicircular section; 9. Transition arc section; 10. Locking channel; 11. Horizontal opening; 12. Unlocking groove; 13. Locking groove; 14. Lower mounting hole; 15. Upper mounting hole; 16. Guide cone surface; 17. Positioning glass bead groove; 18. Glass bead screw; 19. Bushing. Detailed Implementation

[0027] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the protection scope of the present utility model.

[0028] Please see Figures 1 to 6 This illustration shows an embodiment of the present invention providing a display screen upper and lower lock, which is disposed on an LED display screen frame 3 and is used to connect two adjacent LED display screen frames 3. It includes an upper lock and a lower lock, which are respectively distributed on the upper and lower sides of the LED display screen frame 3 and are configured to be aligned and locked. The upper lock has a locking part 1 with a lock hole 2, and the lower lock includes a lock rod 4 and a rotating handle 5. The lock rod 4 includes a round rod part 6 and a flat head 7. The rotating handle 5 is connected to the round rod part 6 at a predetermined angle. The cross-section of the flat head 7 includes a semi-circular segment 8 and a transition arc segment 9. The lock rod 4 is eccentrically positioned with respect to the lock hole 2, and the axis of the lock rod 4 is parallel to and offset from the axis of the lock hole 2. The transition arc segment 9 of the flat head 7 is clearance-fitted with the lock hole 2 so that the flat head 7 can be inserted into the lock hole 2. The semi-circular segment 8 of the flat head 7 forms a radial interference fit with the lock hole 2 through eccentric frictional contact to achieve locking.

[0029] Specifically, the radius of curvature of the transition arc segment 9 is greater than the radius of the keyhole 2, and the radius of the semicircular segment 8 is the same as the radius of the keyhole 2. More specifically, the distance from the upper wall of the keyhole 2 to the center of the semicircular segment 8 should be greater than the distance from the middle vertex of the transition arc segment 9 to the center of the semicircular segment 8. When the rotating handle 5 drives the locking rod 4 to rotate until the transition arc segment 9 faces the upper wall of the keyhole 2, the middle vertex of the transition arc segment 9 is lower than the upper wall of the keyhole 2, so that the locking rod 4 can be inserted into the keyhole 2 by moving the rotating handle 5 laterally.

[0030] Specifically, the lower locking component also includes a locking channel 10, and the locking rod 4 is coaxially mounted in the locking channel 10. The side wall of the locking channel 10 has a transverse opening 11. The upper side of the transverse opening 11 has an unlocking groove 12 and a locking groove 13 that communicate with the locking channel 10. The rotating handle 5 passes through the transverse opening 11 and is fixedly connected to the locking rod 4 at an angle. The rotating handle 5 can drive the locking rod 4 to move along the axial direction of the locking channel 10 within the locking channel 10, and the rotating handle 5 can be rotated into the unlocking groove 12 or the locking groove 13.

[0031] More specifically, the unlocking groove 12 and the locking groove 13 are arranged sequentially in the direction toward the locking part 1. When the rotating handle 5 is turned into the unlocking groove 12, the flat head 7 is located outside the lock hole 2. When the rotating handle 5 is turned into the locking groove 13, the semicircular section 8 of the flat head 7 is in eccentric frictional contact with the inner wall of the lock hole 2.

[0032] In some specific embodiments, locking the upper and lower cabinet frames requires first aligning adjacent LED display cabinet frames 3. The locking part 1 of the upper locking member with guide cone surface 16 is inserted into the lower mounting hole 14 of the lower locking member. At this time, the locking hole 2 is opposite to the locking channel 10. Then, the rotating handle 5 is moved to directly below the locking groove 13. The movement of the rotating handle 5 will drive the locking rod 4 to move along the locking channel 10 until the flat head 7 is inserted into the locking hole 2. The transition arc section 9 of the flat head 7 is clearance-fitted with the locking hole 2 to ensure that the flat head 7 can be smoothly inserted into the locking hole 2. Then, the rotating handle 5 is rotated upwards. The rotating handle 5 drives the locking rod 4 to rotate approximately 90°. At this time, the semi-circular section 8 of the flat head 7 is in eccentric contact with the inner wall of the locking hole 2, generating radial clamping force. An interference fit friction lock is formed, and the rotating handle 5 is engaged in the locking groove 13 of the lock track 10 for limiting. The glass bead part of the glass bead screw 18 is embedded in the positioning glass bead groove 17, which emits a glass bead positioning sound and significantly increases the frictional resistance to prevent loosening. When unlocking, the rotating handle 5 is rotated downwards, and the rotating handle 5 drives the locking rod 4 to rotate approximately 90°. At this time, the transition arc 9 of the flat head 7 is engaged with the lock hole 2 with a clearance, so that the locking rod 4 can move within the lock track 10 and thus the flat head 7 is disengaged from the lock hole 2. When the rotating handle 5 moves to directly below the unlocking groove 12, the flat head 7 is completely disengaged from the lock hole 2. At this time, the rotating handle 5 is rotated upwards, and the rotating handle 5 is engaged in the unlocking groove 12 of the lock track 10 for limiting, thus completing the unlocking.

[0033] More specifically, the lower locking member is provided with a lower mounting hole 14, which forms a cross-shaped through hole structure with the locking channel 10. The upper locking member is provided with an upper mounting hole 15. The lower end of the locking part 1 is fixed to the upper mounting hole 15, and the upper end of the locking part 1 is inserted into the lower mounting hole 14. The lock hole 2 is located at the upper end of the locking part 1 and is opposite to the locking channel 10. The axial center line of the locking channel 10 and the center line of the lock hole 2 are not on the same straight line.

[0034] More specifically, the upper end of the locking part 1 is provided with a guide cone surface 16, which is used to guide the locking part 1 into the lower mounting hole 14. The guide cone surface 16 can assist in the alignment and insertion, reducing the difficulty of installation.

[0035] Specifically, the round rod portion 6 is provided with a plurality of positioning glass bead grooves 17 around its circumference, and the lower locking component also includes a plurality of glass bead screws 18 installed on the LED display screen frame 3. When the locking rod 4 is rotated to lock with the locking hole 2, the glass bead portion of each of the glass bead screws 18 is engaged in the corresponding positioning glass bead grooves 17 to assist in locking.

[0036] More specifically, the lower locking component further includes a bushing 19, which is installed on the inner wall of the end of the locking channel 10 near the lower mounting hole 14. The bushing 19 is coaxial with the locking rod 4, and the inner diameter of the bushing 19 is larger than the diameter of the locking rod 4. The locking rod 4 passes through the lock hole 2 and is inserted into the bushing 19, and the flat head 7 does not protrude from the outer end face of the bushing 19.

[0037] In some specific embodiments, the bushing 19 is detachably installed on the inner wall of the end of the lock track 10, and its inner diameter is slightly larger than the diameter of the lock rod 4. The bushing 19 and the lock rod 4 form a clearance fit. When the lock rod 4 passes through the lock hole 2 and is inserted into the bushing 19, the bushing 19 guides the lock rod 4 to maintain axial stability. Specifically, the flat head 7 may cause a slight deviation of the lock rod 4 due to eccentric frictional contact with the lock hole 2 during rotation. The bushing 19 can replace the lock track 10 to bear the friction caused by the slight deviation of the lock rod 4, thereby extending the service life of the lock track 10. More specifically, the bushing 19 may be made of stainless steel or a wear-resistant alloy material.

[0038] Specifically, the inner wall of the lock hole 2 is provided with a wear-resistant metal sheath or the locking part 1 is made of stainless steel.

[0039] Specifically, the length of the flat head 7 is greater than the depth of the key hole 2 to ensure that the friction contact surface of the semicircular segment 8 of the flat head 7 is in full contact with the inner wall of the key hole 2.

[0040] In summary, this type of display screen top and bottom lock forms a radial interference fit between the eccentrically positioned flat head 7 and the lock hole 2. It can quickly lock or unlock by simply rotating the handle 5 without the need for auxiliary tools, making it convenient to operate and significantly improving assembly efficiency. This type of display screen top and bottom lock prevents loosening after locking by setting a positioning glass bead groove 17 and a glass bead screw 18. When the locking rod 4 is rotated to the locking position, the glass bead part of the glass bead screw 18 will embed into the groove of the round rod part and emit a glass bead positioning sound to indicate that the installation is in place. At the same time, the rotation resistance increases to prevent springback and loosening.

[0041] It should be noted that this utility model is not limited to the above-described embodiments. Based on the inventive spirit of this utility model, those skilled in the art can make other changes, and these changes made based on the inventive spirit of this utility model should be included within the scope of protection claimed by this utility model.

Claims

1. A display screen upper and lower lock, disposed on an LED display screen frame, for connecting two adjacent LED display screen frames, comprising an upper locking component and a lower locking component, wherein the upper locking component and the lower locking component are respectively distributed on the upper and lower sides of the LED display screen frame and are configured to be aligned and locked, characterized in that, The upper locking member has a locking part with a lock hole, and the lower locking member includes a locking rod and a rotating handle. The locking rod includes a round rod part and a flat head. The rotating handle is connected to the round rod part at a predetermined angle. The cross-section of the flat head includes a semi-circular segment and a transition arc segment. The locking rod is eccentrically positioned with respect to the lock hole. The axis of the locking rod is parallel to and offset from the axis of the lock hole. The transition arc segment of the flat head is clearance-fitted with the lock hole so that the flat head can be inserted into the lock hole. The semi-circular segment of the flat head is eccentrically frictionally contacted with the lock hole to form a radial interference fit to achieve locking.

2. A display screen locking mechanism as described in claim 1, characterized in that, The radius of curvature of the transition arc segment is greater than the radius of the keyhole, and the radius of the semicircular segment is the same as the radius of the keyhole.

3. A display screen locking mechanism as described in claim 1, characterized in that, The lower locking component also includes a locking channel, and the locking rod is coaxially mounted in the locking channel. The side wall of the locking channel has a transverse opening, and the upper side of the transverse opening has an unlocking groove and a locking groove communicating with the locking channel. The rotating handle passes through the transverse opening and is fixedly connected to the locking rod at an angle. The rotating handle can drive the locking rod to move along the locking channel axis in the locking channel, and the rotating handle can be rotated into the unlocking groove or the locking groove.

4. A display screen locking mechanism as described in claim 3, characterized in that, The unlocking groove and the locking groove are arranged sequentially in the direction toward the locking part. When the rotating handle is turned into the unlocking groove, the flat head is located outside the lock hole. When the rotating handle is turned into the locking groove, the semicircular section of the flat head makes eccentric frictional contact with the inner wall of the lock hole.

5. A display screen locking mechanism as described in claim 3, characterized in that, The lower locking member is provided with a lower mounting hole, which forms a cross-shaped through hole structure with the locking channel. The upper locking member is provided with an upper mounting hole. The lower end of the locking part is fixed to the upper mounting hole, and the upper end of the locking part is inserted into the lower mounting hole. The lock hole is located at the upper end of the locking part and is opposite to the locking channel. The axial center line of the locking channel and the center line of the lock hole are not on the same straight line.

6. A display screen locking mechanism as described in claim 5, characterized in that, The upper end of the locking part is provided with a guide cone surface, which is used to guide the locking part into the lower mounting hole.

7. A display screen locking mechanism as described in claim 1, characterized in that, The round rod portion is provided with multiple positioning glass bead grooves in the circumference. The lower locking component also includes multiple glass bead screws installed on the LED display screen frame. When the locking rod is rotated to lock with the lock hole, the glass bead portion of each glass bead screw is engaged in the corresponding positioning glass bead groove to assist in locking.

8. A display screen locking mechanism as described in claim 5, characterized in that, The lower locking component also includes a bushing, which is fitted onto the inner wall of the end of the locking channel near the lower mounting hole. The bushing is coaxial with the locking rod, and the inner diameter of the bushing is larger than the diameter of the locking rod. The locking rod passes through the lock hole and is inserted into the bushing, and the flat head does not protrude from the outer end face of the bushing.

9. A display screen locking mechanism as described in claim 1, characterized in that, The inner wall of the keyhole is provided with a wear-resistant metal sheath or the locking part is made of stainless steel.

10. A display screen locking mechanism as described in claim 1, characterized in that, The length of the flat head is greater than the depth of the keyhole.

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